Nnamdi Okongwu was a center senior on the Chino Hills High School basketball team. He posted this picture on his Twitter account on Feb. 16, 2014.

“He was such an amazing people person,” Baik said. “He was always so humble. On Friday, he was trying to catch up with summer school. He had a day off and spent it coming to a basketball camp with little kids. He loved being around people.”

Dozens of people tweeted “RIP” early Thursday morning, around the same time two posts appeared on Okongwu’s Instagram asking people to pray for him.

Okongwu’s hospitalization followed a similar death within the last year, the school’s cross country coach Jim Bergmann said.

“I knew he was a good basketball player and a star. This is the second skateboarding accident we’ve had in this year; we had another student die earlier this year,” Bergmann said.

Okongwu was treated at Arrowhead Regional Medical Center in Colton, the Times reported.